How to use the rasa.utils.io.read_config_file function in rasa

def test_prepare_credentials_for_rasa_x_if_rasa_channel_not_given(tmpdir: Path):
    credentials_path = str(tmpdir / "credentials.yml")

    io_utils.write_yaml_file({}, credentials_path)

    tmp_credentials = x._prepare_credentials_for_rasa_x(
        credentials_path, "http://localhost:5002"
    )

    actual = io_utils.read_config_file(tmp_credentials)

    assert actual["rasa"]["url"] == "http://localhost:5002"

def read_global_config() -> Dict[Text, Any]:
    """Read global Rasa configuration."""
    # noinspection PyBroadException
    try:
        return rasa.utils.io.read_config_file(GLOBAL_USER_CONFIG_PATH)
    except Exception:
        # if things go south we pretend there is no config
        return {}

def __init__(
        self,
        config_file: Text,
        domain_path: Optional[Text] = None,
        training_data_paths: Optional[Union[List[Text], Text]] = None,
        project_directory: Optional[Text] = None,
    ):
        self.config = io_utils.read_config_file(config_file)
        if domain_path:
            self._domain_paths = [domain_path]
        else:
            self._domain_paths = []
        self._story_paths = []
        self._nlu_paths = []
        self._imports = []
        self._additional_paths = training_data_paths or []
        self._project_directory = project_directory or os.path.dirname(config_file)

        self._init_from_dict(self.config, self._project_directory)

        extra_story_files, extra_nlu_files = data.get_core_nlu_files(
            training_data_paths
        )
        self._story_paths += list(extra_story_files)

def __init__(
        self,
        config_file: Optional[Text] = None,
        domain_path: Optional[Text] = None,
        training_data_paths: Optional[Union[List[Text], Text]] = None,
    ):
        if config_file and os.path.exists(config_file):
            self.config = io_utils.read_config_file(config_file)
        else:
            self.config = {}

        self._domain_path = domain_path

        self.story_files, self.nlu_files = data.get_core_nlu_files(training_data_paths)

domain_path: Optional[Text] = None,
        training_data_paths: Optional[Union[List[Text], Text]] = None,
    ):
        self._domain_path = domain_path

        self._story_files, self._nlu_files = data.get_core_nlu_files(
            training_data_paths
        )

        self.core_config = {}
        self.nlu_config = {}
        if config_file:
            if not isinstance(config_file, list): config_file = [config_file]
            for file in config_file:
                if not os.path.exists(file): continue
                config = io_utils.read_config_file(file)
                lang = config["language"]
                self.core_config = {"policies": config["policies"]}
                self.nlu_config[lang] = {"pipeline": config["pipeline"], "data": lang}

def _prepare_credentials_for_rasa_x(
    credentials_path: Optional[Text], rasa_x_url: Optional[Text] = None
) -> Text:
    credentials_path = cli_utils.get_validated_path(
        credentials_path, "credentials", DEFAULT_CREDENTIALS_PATH, True
    )
    if credentials_path:
        credentials = io_utils.read_config_file(credentials_path)
    else:
        credentials = {}

    # this makes sure the Rasa X is properly configured no matter what
    if rasa_x_url:
        credentials["rasa"] = {"url": rasa_x_url}
    dumped_credentials = yaml.dump(credentials, default_flow_style=False)
    tmp_credentials = io_utils.create_temporary_file(dumped_credentials, "yml")

    return tmp_credentials

def _prepare_credentials_for_rasa_x(
    credentials_path: Optional[Text], rasa_x_url: Optional[Text] = None
) -> Text:
    credentials_path = cli_utils.get_validated_path(
        credentials_path, "credentials", DEFAULT_CREDENTIALS_PATH, True
    )
    if credentials_path:
        credentials = io_utils.read_config_file(credentials_path)
    else:
        credentials = {}

    # this makes sure the Rasa X is properly configured no matter what
    if rasa_x_url:
        credentials["rasa"] = {"url": rasa_x_url}
    dumped_credentials = yaml.dump(credentials, default_flow_style=False)
    tmp_credentials = io_utils.create_temporary_file(dumped_credentials, "yml")

    return tmp_credentials

def _init_from_file(self, path: Text) -> None:
        path = os.path.abspath(path)
        if os.path.exists(path) and data.is_config_file(path):
            config = io_utils.read_config_file(path)

            parent_directory = os.path.dirname(path)
            self._init_from_dict(config, parent_directory)
        else:
            raise_warning(f"'{path}' does not exist or is not a valid config file.")

def create_http_input_channels(
    channel: Optional[Text], credentials_file: Optional[Text]
) -> List["InputChannel"]:
    """Instantiate the chosen input channel."""

    if credentials_file:
        all_credentials = rasa.utils.io.read_config_file(credentials_file)
    else:
        all_credentials = {}

    if channel:
        if len(all_credentials) > 1:
            logger.info(
                "Connecting to channel '{}' which was specified by the "
                "'--connector' argument. Any other channels will be ignored. "
                "To connect to all given channels, omit the '--connector' "
                "argument.".format(channel)
            )
        return [_create_single_channel(channel, all_credentials.get(channel))]
    else:
        return [_create_single_channel(c, k) for c, k in all_credentials.items()]